package com.atguigu.springcloud.controller;

import com.atguigu.springcloud.entities.CommonResult;
import com.atguigu.springcloud.entities.Payment;

import com.atguigu.springcloud.lb.LoadBalancer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;
import java.net.URI;
import java.util.List;

@RestController
public class OrderController {

    private Logger logger = LoggerFactory.getLogger(OrderController.class);

//    private static final String PAYMENT_URL = "http://localhost:8001";
private static final String PAYMENT_URL = "http://CLOUD-PAYMENT-SERVICE";

    @Resource
    private RestTemplate restTemplate;

    @Resource
    private DiscoveryClient discoveryClient;

    @Resource
    private LoadBalancer loadbalancer;


    @PostMapping(value = "/consumer/payment/create")
    public CommonResult<Payment> create(Payment payment) {
        logger.info("payment:{}",payment);
        return restTemplate.postForObject(PAYMENT_URL + "/payment/create", payment, CommonResult.class);
    }

    @GetMapping("/consumer/payment/get/{id}")
    public CommonResult<Payment> getPayment(@PathVariable("id") Long id){
        logger.info("id:{}",id);
        return restTemplate.getForObject(PAYMENT_URL + "/payment/get/"+id,CommonResult.class);
    }
    @GetMapping("/consumer/payment/getForEntity/{id}")
    public CommonResult<Payment> getPayment2(@PathVariable("id") Long id){
        ResponseEntity<CommonResult> entity = restTemplate.getForEntity(PAYMENT_URL + "/payment/get/" + id, CommonResult.class);
        if (entity.getStatusCode().is2xxSuccessful()){
            logger.info(entity.getStatusCode().toString()+"\t"+entity.getHeaders());
            return entity.getBody();
        } else {
            return new CommonResult(444,"操作失败");
        }
    }

    @GetMapping("/consumer/payment/lb")
    public String getPaymentLB() {
        List<ServiceInstance> instances = discoveryClient.getInstances("CLOUD-PAYMENT-SERVICE");
        if (instances == null || instances.size() <= 0){
            return null;
        }
        ServiceInstance instance = loadbalancer.instance(instances);
        URI uri = instance.getUri();
        return restTemplate.getForObject(uri + "/payment/lb", String.class);

    }


    // ====== zipkin + sleuth
    @GetMapping("/consumer/payment/zipkin")
    public String paymentZipkin(){

        String result = restTemplate.getForObject("http://localhost:8001" + "/payment/zipkin/",String.class);

        return result;
    }
}
